程序代码：

#include <stdio.h>

int main(void)
{
    int a, max, min, max_i, min_i;
    printf("请输入数字：\n");
    scanf("%d", &a);
    max = min = a;
    max_i = min_i = 0;
    for( int i=1; i<6; i++ )
    {
        scanf("%d", &a);
        if( max < a ) 
        {
            max = a; 
            max_i = i;
        }
        if( min > a )
        {
            min = a;
            min_i = i;
        }
    }
    printf("最大值为Max[%d][%d]=%d\n", max_i/3, max_i%3, max);
    printf("最小值为Min[%d][%d]=%d\n", min_i/3, min_i%3, min);
    return 0;
}